10161261620 has 12 divisors (see below), whose sum is σ = 21338649444. Its totient is φ = 4064504640.

The previous prime is 10161261619. The next prime is 10161261647. The reversal of 10161261620 is 2616216101.

It can be written as a sum of positive squares in 2 ways, for example, as 5228446864 + 4932814756 = 72308^2 + 70234^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 10161261620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254031521 + ... + 254031560.

It is an arithmetic number, because the mean of its divisors is an integer number (1778220787).

Almost surely, 2^10161261620 is an apocalyptic number.

10161261620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10161261620 is an abundant number, since it is smaller than the sum of its proper divisors (11177387824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10161261620 is a wasteful number, since it uses less digits than its factorization.

10161261620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508063090 (or 508063088 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 10161261620 its reverse (2616216101), we get a palindrome (12777477721).

The spelling of 10161261620 in words is "ten billion, one hundred sixty-one million, two hundred sixty-one thousand, six hundred twenty".